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0.10d+0.05(d+9)=2.25
We move all terms to the left:
0.10d+0.05(d+9)-(2.25)=0
We add all the numbers together, and all the variables
0.10d+0.05(d+9)-2.25=0
We multiply parentheses
0.10d+0.05d+0.45-2.25=0
We add all the numbers together, and all the variables
0.15d-1.8=0
We move all terms containing d to the left, all other terms to the right
0.15d=1.8
d=1.8/0.15
d=12+2.2204460492503E-16/0.15
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